Asner, 82, plays Charlie, a grandfather who's been dropped on his grandson Joey Tucker's doorstep. Joey is then forced to deal with the octogenarian's antics.

During the film Joey also finds out he is a father and a grandfather, with the arrival of two other guests on his doorstep.

The film follows Joey as his bachelor lifestyle conflicts with newfound responsibility.

Asner says Charlie is attempting to pass down his "nicer qualities" to his struggling grandson.

"This is a self-improvement movie," he said with a smirk.

A self-proclaimed curmudgeon, Asner said he liked playing Charlie because "he's so much nicer a human being than I am."

"I like to take on those roles because people mistake it for the truth," he said with a laugh.

He said he was drawn to the film, which was envisioned by leadPaul Ben-Victor, because of his character, the script and the conflict that takes place. He also likes the fact that the film is family-friendly and appeals to multiple generations.

There won't be anyone shot or heads chopped off in this film, he said.